
table{
    border-collapse: collapse;
}
td{
  width:100px ;
  height: 50px;
  line-height: 50px;
  text-align: center;
  border: 1px solid #000;
  font-size: 30px;
}
.change{
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display:none;
    justify-content: center;
    align-items: center;
    position: fixed;
    top:0;
    left:0;
}
.change>div{
    width: 300px;
    height: 300px;
    padding: 30px 15px;
    background: #fff;
}